6-9-p0027-0080-vx21_en.pdf - 第53页

Wiring Caution 1. As a rule, use electrical wire with a cross sectional area of 0.5 to 1.25 mm 2 for wiring. Furthermore, do not allow excessive force to be ap- plied to the lines. 2. Use electrical circuits which do not…

Disassembly/Assembly Procedures

Caution

Piping

Warning

Caution

1. During use, deterioration of the tube or damage to

the fittings could cause tubes to come loose from

their fittings and thrash about.

To prevent uncontrolled tube movement, install protective

covers or fasten tubes securely in place.

2. For piping the tube, fix the product securely using the

mounting holes so that the product is not in the air.

1. Preparation before piping

Before piping is connected, it should be thoroughly blown out

with air (flushing) or washed to remove chips, cutting oil and

other debris from inside the pipe. Avoid pulling, compressing, or

bending the valve body when piping.

2. Avoid connecting ground lines to piping, as this may

cause electric corrosion of the system.

3. Always tighten threads with the proper tightening

torque.

When using steel piping, tighten with the proper tightening

torque shown below.

Lower tightening torque will lead into fluid leakage.

4. Connection of piping to products

When connecting piping to a product, avoid mistakes regarding

the supply port etc.

5. Winding of sealant tape

When connecting pipes, fittings,

etc., be sure that chips from the

pipe threads and sealing material

do not enter the valve.

Furthermore, when sealant tape is

used, leave 1.5 to 2 thread ridges

exposed at the end of the threads.

6. In applications such as vacuum and non-leak speci-

fications, use caution specifically against the

contamination of foreign objects or airtightness of

the fittings.

Tightening Torque for Piping

Thread size

Rc1/8

Rc1/4

Rc3/8

Rc1/2

7 to 9

12 to 14

22 to 24

28 to 30

Proper tightening torque (N·m)

Individual SUP

for medium vacuum

Common SUP

for air

Manifold Exploded View

IN port (Common SUP)

OUT port (Individual SUP)

IN port

Gasket

IN port

Solenoid valve for manifold

Gasket

Mounting screw

OUT port (Common SUP)

IN port (Individual SUP)

Individual port sideIndividual port side

∗ Mounting orientation exists when mounting valves onto manifold base.

Mount it as shown above.

∗ Take great care when special electrical entry direction (XC) is used.

Individual port

Solenoid valve

interface for

manifold

Manifold base

VX21/22/23 Series

Specific Product Precautions 4

Be sure to read this before handling the products.

Refer to back page 50 for Safety Instructions and pages 17 to 19 for 2 Port Solenoid

Valve for Fluid Control Precautions.

Winding

direction

Sealant tape

Expose approx.

2 threads

Wiring

Caution

1. As a rule, use electrical wire with a cross sectional

area of 0.5 to 1.25 mm

for wiring.

Furthermore, do not allow excessive force to be ap-

plied to the lines.

2. Use electrical circuits which do not generate chatter-

ing in their contacts.

3. Use voltage which is within ±10% of the rated volt-

age. In cases with a DC power supply where impor-

tance is placed on responsiveness, stay within ±5%

of the rated value. The voltage drop is the value in

the lead wire section connecting the coil.

4. When a surge from the solenoid affects the electrical

circuitry, install a surge voltage suppressor etc., in

parallel with the solenoid. Or, adopt an option that

comes with the surge voltage protection circuit.

(However, a surge voltage occurs even if the surge

voltage protection circuit is used.)

Warning

1. The solenoid valve is an electrical product. For safety,

install an appropriate fuse and circuit breaker before

use.

When using multiple solenoid valves, it is not sufficient to

merely install one fuse on the inlet side. In order to ensure the

safety of the devices, select and install a fuse for each circuit.

2. Do not apply AC voltage to Class “H” coil AC type

unless it is built in full-wave rectifier, or the coil will

be damaged.

Recommended

Unacceptable

Fig. 2 Binding tubes with bands

Straight

portion

Mounting

pitch

Fig. 1 Recommended piping configuration

Recommended Piping Conditions

1. When connecting tubes using One-touch fittings,

provide some spare tube length shown in Fig. 1, rec-

ommended piping configuration.

Also, do not apply external force to the fittings when binding

tubes with bands etc. (see Fig. 2.)

Tube

size

Mounting pitch

Unit: mm

Nylon tubing

Soft nylon tubing

Polyurethane tubing

44 or more

84 or more

89 or more

112 or more

140 or more

168 or more

29 or more

39 or more

56 or more

58 or more

70 or more

82 or more

25 or more

39 or more

57 or more

52 or more

69 or more

88 or more

Straight

portion length

ø1/8"

ø6

ø1/4"

ø8

ø10

ø12

16 or more

30 or more

32 or more

40 or more

50 or more

60 or more

VX21/22/23 Series

Specific Product Precautions 5

Be sure to read this before handling the products.

Refer to back page 50 for Safety Instructions and pages 17 to 19 for 2 Port Solenoid

Valve for Fluid Control Precautions.

VX2

VXK

VXD

VXZ

VXS

VXB

VXE

VXP

VXR

VXH

VXF

VX3

VXA

VX2

Electrical Connections

Caution

 Grommet

Class B coil: AWG20 Insulator O.D. 2.6 mm

Class H coil: AWG18 Insulator O.D. 2.1 mm

Caution

Operating Environment

Warning

1. Be sure to have appropriate protective measures in

place when installed in environments where there is

the constant presence of water, such as water spray,

condensation, high humidity, etc. This product has

an IP65 protective construction; however, when

used in the above-mentioned environments, liquid

may find its way inside the enclosure through micro-

scopic gaps, possibly resulting in the burning out,

short-circuiting, or ignition of coils.

2. Do not use in an atmosphere having corrosive gases,

chemicals, sea water, or where there is direct contact

with any of these.

3. Do not use in explosive atmospheres.

4. Do not use in locations subject to vibration or impact.

5. Do not use in locations where radiated heat will be

received from nearby heat sources.

6. Employ suitable protective in locations where there

is contact with oil or welding spatter, etc.

Maintenance

Warning

1. Filters and strainers

1) Be careful regarding clogging of filters and strainers.

2) Replace filter elements after one year of use, or earlier if the

pressure drop reaches 0.1 MPa.

3) Clean strainers when the pressure drop reaches 0.1 MPa.

2. Lubrication

When using after lubricating, never forget to lubricate continuously.

3. Storage

In case of long term storage after use, thoroughly remove all

moisture to prevent rust and deterioration of rubber materials etc.

4. Exhaust the drainage from an air filter periodically.

1. Removing the product

The valve will reach a high temperature when used with high

temperature fluids. Confirm that the valve temperature has

dropped sufficiently before performing work. If touched inadver-

tently, there is a danger of being burned.

1) Shut off the fluid supply and release the fluid pressure in the

system.

2) Shut off the power supply.

3) Dismount the product.

2. Low frequency operation

Switch valves at least once every 30 days to prevent malfunc-

tion. Also, in order to use it under the optimum state, conduct a

regular inspection once a half year.

Operating Precautions

Warning

If there is a possibility of reverse pressure being applied

to the valve, take countermeasures such as mounting a

check valve on the downstream side of the valve.

2. When problems are caused by a water hammer, in-

stall water hammer relief equipment (accumulator

etc.), or use an SMC water hammer relief valve (VXR

series).

VX21/22/23 Series

Specific Product Precautions 6

Be sure to read this before handling the products.

Refer to back page 50 for Safety Instructions and pages 17 to 19 for 2 Port Solenoid

Valve for Fluid Control Precautions.

 DIN terminal

Disassembly

1. After loosening the binding head screw with flange, then if the

housing is pulled in the direction of the arrow, the connector will

be removed from the solenoid valve.

2. Pull out the binding head screw with flange from the housing.

3. There is a cutout on the bottom of the terminal block. Insert a

small flat head screwdriver, etc. into this cutout, and remove the

terminal block from the housing. (See figure below.)

Remove the ground nut, and pull out the washer and the rubber seal.

Wiring

1. Pass the cable through the ground nut, washer and rubber seal

in this order, and insert these parts into the housing.

2. Loosen the binding head screw of the terminal block, then insert

the core wire or the crimped terminal of the lead wire into the

terminal, and securely fix it with the binding head screw. The

binding head screw of the terminal block is M3.

Note 1)

Tighten the screw to a torque of between 0.5 and 0.6 N·m.

Note 2) Cable O.D.: ø6 to ø12 mm

Note 3) For an outside cable diameter of ø9 to 12 mm, remove

the internal parts of the rubber seal before using.

Assembly

1. Pass the cable through the ground nut, washer, rubber seal and

the housing in this order, and connect to the terminal block.

Then, set the terminal block inside the housing. (Push in the

terminal block until it snaps into position.)

2. Insert the rubber seal and the washer in this order into the cable

entry of the housing, and then tighten the ground nut securely.

Insert the gasket between the bottom part of the terminal block and

the plug attached to the equipment, and then insert the binding

head screw with flange from the top of the housing, and tighten it.

Note 1)

Tighten the screw to a torque of between 0.5 and 0.6 N·m.

Note 2)

The orientation of the connector can be changed in steps

of 90° by changing the method of assembling the housing

and the terminal block.

Rated

voltage

100 VAC

200 VAC

Other AC

Black

Blue

Red

Gray

Red

Blue

Red

Gray

Lead wire color

∗ There is no polarity.

Housing

Crimped terminal

Applicable crimped terminal: JIS C2805 R1.25-3

Ground nut

Washer

Cable

Rubber seal

Binding head screw with flange

Light (When

equipped

with a light)

∗

Terminal

block

∗1

The position is fixed regardless of the electrical entry direction.

Binding

head screw